<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>2.20</title>
</head>

<body>
    <script>
        let { toString: s } = 123;
        console.log(s === Number.prototype.toString);   //true

        let { toString: b } = true;
        console.log(b === Boolean.prototype.toString);  //true
    </script>
    </body>
    
    </html>